<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<title>切换元素显示</title>
	<style type="text/css">
        .hover-tips {
            display: inline-block;
        }
        .hover-tips .tips-tt{
            width: 170px;
            background-color: #ccc;
            line-height: 36px;
            text-align: center;
            border-radius: 5px;
        }
        .hover-tips .tips-bd {
            width: 170px;
            height: 170px;
            background: url(http://coding.imweb.io/img/p2/qr-bg.png) no-repeat;
            /* 请补充剩余样式 */
            display: none;
            border: 1px solid #ccc;
            box-shadow: 0 0 3px rgba(0, 0, 0, .3);
            border-radius: 5px;
        }
        .hover-tips:hover .tips-bd {
            display: block;
        }
    </style>
</head>
<body>
    <div class="hover-tips">
        <p class="tips-tt">APP 下载</p>
        <div class="tips-bd"></div>
    </div>
</body>
</html>